nitrates

Something I've been thinking about lately are poverty foods. Paleolithic people did not usually engage in food storage, but with the advent of the neolithic, people starting keeping a larder that could help them survive. Cured, pickled, canned, confited, salted, highly spiced, and dried foods are legacies of this heritage.

Recommended Books

Though much maligned in the paleo diet community, this is a book you should give a chance. A great primer on evolutionary biology and a caution against making too much of paleolithic "just so" stories.